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- W2025525575 abstract "BackgroundDuring programmed cell death, apoptotic cells are rapidly removed by phagocytes. How dying cells are recognized remains poorly understood.ResultsHere we identify a secreted lipid transfer/LPS-binding family protein, NRF-5, which is required for efficient clearance of cell corpses. We observed that phosphatidylserine (PS), which is externalized to the outer leaflet of plasma membranes in apoptotic cells, is also detected on the surface of engulfing cells. Loss of NRF-5 function completely blocks PS appearance on engulfing cells but causes accumulation of PS on apoptotic cells, a phenotype observed in both ced-7(lf) and ttr-52(lf) mutants. The NRF-5 protein is expressed in and secreted from body wall muscle cells and clusters around apoptotic cells in a CED-7-dependent manner. NRF-5 associates with TTR-52, binds PS, and displays lipid transfer activity in vitro.ConclusionOur data suggest that NRF-5 may act with CED-7 and TTR-52 to mediate PS transfer from apoptotic cells to engulfing cells and thus promotes engulfment by phagocytes." @default.
- W2025525575 created "2016-06-24" @default.
- W2025525575 creator A5010034374 @default.
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- W2025525575 date "2012-07-01" @default.
- W2025525575 modified "2023-09-23" @default.
- W2025525575 title "C. elegans Secreted Lipid-Binding Protein NRF-5 Mediates PS Appearance on Phagocytes for Cell Corpse Engulfment" @default.
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- W2025525575 doi "https://doi.org/10.1016/j.cub.2012.06.004" @default.
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